use strict;
use WWW::Mechanize;
my $url = "http://us.expasy.org/tools/protscale.ht…
my $sequence = "GSHMLEDPVVLQRRDWENPGVTQLNRLAA";
my $outfile = "out.htm";
my $mech = WWW::Mechanize->new();
$mech->get($url);
$mech->form_number(3);
$mech->field(query => "$sequence");
$mech->click();
my $output_page = $mech->content();
open(OUTFILE, ">$outfile");
print OUTFILE "$output_page";
close(OUTFILE);